这种物质很容易由甲醛和肼反应而得到.The material is readily prepared by reaction of formaldehyde and hydrazine.甲醛能慢慢使多种病毒失去活性.Formaldehyde slowly inactivates many viruses.二氧化硫和甲醛都可产生刺激.Sulfur dioxide and formaldehyde both produce irritati...
cyclic grazing循环放牧Kinetic parameters of a cyclic amidase with maleimide as the substrate was assayed by HPLC method.采用高效液相色谱法(HPLC)分析并测定了环二酰胺酶水解马来酰亚胺反应的动力学参数.The yields of other cyclic acetals were between 62.并在此条件下合成了多种...
伴随着他视力的下降，他的画作变得更富印象派风格。His paintings had become more impressionistic as his eyesight dimmed.有正常视力的孩子的盲人父母the blind parents of sighted children认为吃胡萝卜可以改善视力的海外奇谈,多年前已祛除殆尽.The myth that eating carrots improves your eyesigh...